This is not always true. Fedora maintains over 100 RedHat exclusive patches for grub2 alone: https://src.fedoraproject.org/rpms/grub2/tree/rawhide https://src

This is not always true. Fedora maintains over 100 RedHat exclusive patches for grub2 alone: https://src.fedoraproject.org/rpms/grub2/tree/rawhide https://src.fedoraproject.org/rpms/grub2/tree/rawhide Some of these are pretty questionable, particularly disabling the use of "grub-install" on UEFI systems (https://bugzilla.redhat.com/show_bug.cgi?id=1917213 https://bugzilla.redhat.com/show_bug.cgi?id=1917213)